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'No Model.)

.S. E. GHUBBUOK. Machine for Stirring and Discharging Mash. No. 243,511.

PatentdJune 28,1881.

INVENTOR m m m H w ATTORNEYS.

N. PETERS. Phommhagn her. Washinglan. n. (:v

UNITED STATES P T NT I O ICE.

sTmLMAiv E. c'HUBBUoK, OF BOSTON, MASSACHUSETTS, Assienou TO s. E. v

" cnuennon-a sons, OF SAME PLACE.

MACHINE FOR STIRRING AND DISCHARGING MASH.

SPECIFICATION forming part of Letters Patent No. 243,511, dated June as,1881.

Application filed April 2Q, 1881. (No model.)

To all whom it may concern:

Be it known that I, STILLMAN E; OHUB- BUCK, a citizen of the UnitedStates, residing at Boston, in the county of Suffolk and StateofMassachusetts, have invented a new and useful Improvement in Machinesfor Stirring and Discharging Brewers Mash, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, forming part of this specification.

My invention relates to that class of machines for stirring anddischarging mash in which vertically and horizon tallyrevolvin gagitutors and scrapers are used; and myimprovethe ordinary verticalshaft, A, held in position by frame B and resting in a socket in thesupport 0 in the bottom of the tub. The said support is provided withthe usual bevelgear, meshing with a suitable pinion for rotating thehorizontal shaft that carries the stirrers. This shaft terminates in thepinion, which is placed on the opposite side of the vertical shaft fromthe agitators, and in a socket in said pinion a second shaft is looselysecured, in line with the first, for carrying the reversible rakes a andscrapers a. The projecting arms D for supporting the outer ends of saidhorizontal shafts are jointed together rigidly at the center, instead ofbeing constructed in one piece, in order that the several parts of themachine may be removed and replaced without the inconvenience oftaking-down any part of the frame-work or tub.

The said stirrers or agitators consist of feathering paddles orpropellers E, provided with an eye or sleeve at the center of the bladefor receiving the horizontal shaft to which they are secured, and theyare arranged upon said shaft in such manner that the corresponding endsof the blades shall lie in two parallel spiral lines.Asthusconstructedandarranged, it will be seen that at each revolution ofthe series of propellers the mash will be thrown to and from the centerof the tub, or vice versa.

Heretofore stationary propellers have been arranged upon both sides ofthe vertical shaft in such manner that those upon one side would throwthe mash to the center and those upon the other to the side of the tub;but according to this arrangement it would require an entire revolutionof thehorizontal shaft to complete the said operation; By my inventionthis operation is completed at each vertical revolution of thecarrying-shaft, and several times at each horizontal revolution, thusstirring or agitating the mash in a correspondingly greater degree. Itis evident, also, from the spiral arrangement of the paddles, that thework begun by the outer blades is taken up and completed by the innerones in succession, whereby the draft is rendered the lightest that ispracticable without leaving any portion of the mash unagitated. On theopposite side of the vertical shaft are the said reversible rakes andscrapers, which are rigidly secured upon a shaft which is made tooscillate by means of a pinion upon the same and a worm gearingtherewith. The said worm is secured in a vertical position by means ofbrackets cast upon the adjacent supporting-arm, and operated by means ofa handwheel at the top. Each rake is made in one piece with one of thescrapers, and secured centrally tothe shaft in the same manner as thepropellers, so that either the rakes or the scrapers may be used, asdesired, or both may bethrown out of the mash and held in a horizontalposition. The advantage of this arrangement is that the scrapers, whichare not needed until the tub is to be emptied, are easily thrown out ofthe way and the rakes substituted in their place. Where the scrapers arerigidly secured, as in the ordinary way, they tend to throw the mash toa certain part of the tub, and thereby offer unnecessary resistance tothe draft. The said scrapers a are so arranged that the two outer onesshall touch at theirinner edges and ultimately scrape the entirecontents of the tub through the opening over which they pass, while theinner scrapers shall throw the mash in the path of the two outer ones,where it will be taken up at the next revolution until the tub isemptied.

As a modification of the paddles, I may have four or more blades toeach, so arranged that opposite blades shall throw the mash in oppositeor reverse directions. By this means a still greater degree of agitationwill be secured.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-.-

